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Segment Financial Data (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 15,062 | $ 14,354 | $ 44,157 | $ 42,585
Operating profit | $ 2,163 | $ 2,251 | $ 6,720 | $ 6,533
Operating profit margin | 14.40% | 15.70% | 15.20% | 15.30%
Otis [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 3,156 | $ 3,018 | $ 9,091 | $ 8,830
Operating profit | $ 555 | $ 584 | $ 1,551 | $ 1,631
Operating profit margin | 17.60% | 19.40% | 17.10% | 18.50%
UTC Climate, Controls & Security [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 4,688 | $ 4,415 | $ 13,292 | $ 12,602
Operating profit | $ 828 | $ 801 | $ 2,664 | $ 2,279
Operating profit margin | 17.70% | 18.10% | 20.00% | 18.10%
Pratt & Whitney [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 3,871 | $ 3,501 | $ 11,699 | $ 10,902
Operating profit | $ 229 | $ 340 | $ 1,024 | $ 1,136
Operating profit margin | 5.90% | 9.70% | 8.80% | 10.40%
UTC Aerospace Systems [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 3,637 | $ 3,646 | $ 10,888 | $ 10,867
Operating profit | $ 616 | $ 600 | $ 1,771 | $ 1,720
Operating profit margin | 16.90% | 16.50% | 16.30% | 15.80%
Total Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 15,352 | $ 14,580 | $ 44,970 | $ 43,201
Operating profit | $ 2,228 | $ 2,325 | $ 7,010 | $ 6,766
Operating profit margin | 14.50% | 15.90% | 15.60% | 15.70%
Eliminations and other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ (290) | $ (226) | $ (813) | $ (616)
Operating profit | 40 | 18 | 25 | 47
General corporate expenses [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 0 | 0 | 0 | 0
Operating profit | $ (105) | $ (92) | $ (315) | $ (280)

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